JP7013949B2 - urinal - Google Patents

Description

The present invention relates to a urinal that is installed in a toilet and is connected to a drainage lateral branch pipe by a plumbing lamp.

In the drainage horizontal branch pipe connected to the urinals installed simultaneously, a part of the washing water with high urine concentration at the initial stage of drainage drained from the urinals may flow back to the upstream side at the confluence. In this way, the washing water with a high urine concentration that first flows back to the upstream side is pushed up to the upstream side by the washing water that flows back into the confluence, and then the main washing is completed and the washing flows into the confluence. After the amount of water is low, it flows to the downstream side. Therefore, the washing water having a high urine concentration finally passes through the drainage lateral branch pipe, and the washing water having a high urine concentration may not be able to flow to the end and may stay in the drainage horizontal branch pipe. When this retention event occurs, urinary stones may be generated in the drainage lateral branch pipe.

In order to suppress the generation of urinary stones due to this retention event, in the urinal of Patent Document 1, the urine concentration is increased by executing the first equipment cleaning mode and the second equipment cleaning mode after executing the main cleaning mode. The relatively low wash water is finally allowed to flow in the drainage lateral branch pipe.

Further, in the urinal of Patent Document 2, the main washing is divided into a first washing mode and a second washing mode so that the washing water having a relatively low urine concentration finally flows in the drainage lateral branch pipe. ..

Japanese Unexamined Patent Publication No. 2016-61070 Japanese Patent No. 5692422

On the other hand, in a urinal as in Patent Document 1, in order to suppress the occurrence of a retention event, the first equipment cleaning mode and the second equipment cleaning mode are executed after a certain period of time has passed from the end of the main cleaning mode. There is a need to. Therefore, if the previous user and the next user are replaced quickly, the next user may start urinating while the first equipment cleaning mode or the second equipment cleaning mode is being executed. be. Then, the washing water supplied into the drainage lateral branch pipe in the first equipment washing mode and the second equipment washing mode becomes the washing water mixed with urine, and the first equipment washing mode and the second equipment washing mode stay as described above. It cannot play a role in suppressing the generation of urinary stones due to the event, resulting in wasted water.
Similarly, in the case of the urinal of Patent Document 2, if the previous user and the next user are replaced quickly, the next user starts urinating while the second washing mode is being executed. Then, the washing water supplied into the drainage lateral branch pipe in the second washing mode becomes washing water mixed with urine, and the second washing mode suppresses the generation of urinary stones due to the above-mentioned retention event. It cannot play a role and becomes wasteful water.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a urinal that suppresses the generation of urinary stones in the drainage lateral branch pipe due to a retention event.

The urinal according to one aspect of the present invention is a urinal that is installed in a toilet and is connected in the middle of a drainage lateral branch pipe that extends laterally by an instrument drain pipe, and has a bowl portion that receives urine flow and the bowl portion. A urinal body having a drainage port opened at the bottom of the stool, and a trap portion for collecting urine and washing water flowing from the drainage port and discharging the urine and washing water to the equipment drainage pipe as drainage, and use in front of the urinal body. A detection means for detecting a person, a water supply means for supplying wash water to the bowl portion, and a control means for controlling the supply of wash water to the bowl portion are provided, and the control means is the detection means. When the user detects that the user has left, a main washing mode in which the bowl portion is washed and urine in the trap portion is discharged, and a part of the washing water is discharged in the drainage lateral branch pipe after the main washing mode is executed. The control means further executes the main cleaning mode and then executes the first cleaning mode. When the detection means detects the approach of the user by the time the detection means is started, the scheduled execution of the first washing mode is canceled and the forced start of forcibly starting the supply of the washing water to the bowl portion is started. Has a mode.

According to this configuration, the user needs a predetermined preparation time from approaching the urinal to starting urination, so that the urinal flows into the instrument water pipe and the drainage lateral branch pipe in the forced start mode. Drainage is relatively clean water that contains almost no urine. Therefore, by executing the forced start mode, it is possible to suppress the generation of urinary stones in the drainage lateral branch pipe due to the retention event, as compared with the case where the first washing mode is performed while the user is urinating.

In the urinal according to one aspect of the present invention, preferably, the control means is provided with wash water obtained by washing the upstream side of the connection portion by the first wash mode after the first wash mode is executed. The first cleaning mode has a second cleaning mode in which a part of the washing water cleans the upstream side of the connecting portion after a predetermined time that is assumed to flow down to the downstream side of the connecting portion has elapsed. When the detection means detects the approach of the user between the execution and the start of the execution of the second cleaning mode, the scheduled execution of the second cleaning mode is canceled and the forced start mode is executed. do.

According to this configuration, it is possible to suppress the generation of urinary stones in the drainage lateral branch pipe due to the retention event, as compared with the case where the second washing mode is performed while the user is urinating.

In the urinal according to one aspect of the present invention, preferably, the control means executes the forced start mode when the count of the number of users using the urinal exceeds a predetermined number.

According to this configuration, it is possible to suppress the generation of urinary stones in the drainage lateral branch pipe due to the retention event while realizing water saving.

The urinal according to one aspect of the present invention is a urinal that is installed in a toilet and is connected in the middle of a drainage lateral branch pipe that extends laterally by an instrument drain pipe, and has a bowl portion that receives urine flow and the bowl portion. A urinal body having a drainage port opened at the bottom of the stool, and a trap portion for collecting urine and washing water flowing from the drainage port and discharging the urine and washing water to the equipment drainage pipe as drainage, and use in front of the urinal body. A detection means for detecting a person, a water supply means for supplying wash water to the bowl portion, and a control means for controlling the supply of wash water to the bowl portion are provided, and the control means is the detection means. When the user detects the approach of the user, the pre-washing mode in which the washing water is supplied to the bowl portion, and when the detecting means detects the user's departure, the bowl portion is washed and the urine in the trap portion is discharged. The main cleaning mode, the first cleaning mode in which a part of the cleaning water cleans the inside of the drainage lateral branch pipe upstream from the connection portion to which the equipment drainage pipe is connected, and the above-mentioned Further, when the detecting means detects the approach of the user from the execution of the main cleaning mode to the start of the execution of the first cleaning mode, the control means of the first cleaning mode scheduled. The pre-washing mode is executed in which the execution is canceled and the amount of the washing water supplied to the bowl portion is larger than usual.

According to this configuration, the pre-washing mode can play a part of the role of the first washing mode by increasing the supply amount of the washing water more than usual, so that the user is urinating. Compared with the case of carrying out one washing mode, it is possible to suppress the generation of urinary stones in the drainage lateral branch pipe due to the retention event.

According to the urinal of the present invention, it is possible to suppress the generation of urinary stones in the horizontal pipe due to the retention event.

It is a schematic sectional drawing which shows the urinal by embodiment of this invention. It is a schematic top view which looked at the inside of the storage chamber of the upper part of the urinal by embodiment of this invention from the upper surface. It is a block diagram schematically showing the internal structure of the automatic toilet bowl cleaning unit of the urinal according to the embodiment of the present invention. It is a time chart which shows the 1st example of the cleaning operation of the urinal by embodiment of this invention. It is a time chart which shows the 2nd example of the cleaning operation of the urinal by embodiment of this invention. It is a figure which shows roughly the mode that the washing water and urine flow from the urinal into the instrument drain pipe and the drainage lateral branch pipe in the main washing mode M0 of the urinal according to the embodiment of this invention. It is a figure which shows roughly the mode that the washing water flows from a urinal into a drainage pipe and a drainage lateral branch pipe in the first washing mode M1 of the urinal by embodiment of this invention. It is a figure which shows roughly the mode that the washing water flows from a urinal into a drainage pipe and a drainage lateral branch pipe in the second washing mode M2 of the urinal according to embodiment of this invention. FIG. 9A is a diagram showing how urine and wash water flow in the drainage lateral branch pipe when the present cleaning mode M0 is executed in the drainage lateral branch pipe extending to the downstream side of the urinal according to the embodiment of the present invention. be. FIG. 9 (b) In the drainage lateral branch pipe extending to the downstream side of the urinal according to the embodiment of the present invention, when the first washing mode M1 is executed, the washing water mixed with urine and the washing water flow in the drainage horizontal branch pipe. It is a figure which shows. FIG. 9C is a diagram showing a state in which wash water flows in the drainage lateral branch pipe when the second washing mode M2 is executed in the drainage lateral branch pipe extending to the downstream side of the urinal according to the embodiment of the present invention. .. It is a time chart which shows the 3rd example of the cleaning operation of the urinal by embodiment of this invention. It is a time chart which shows an example of the cleaning operation of the urinal by the modification of this invention.

The urinal according to the embodiment of the present invention will be described with reference to the accompanying drawings. First, the basic structure of the urinal will be described with reference to FIGS. 1 and 2. FIG. 1 is a schematic cross-sectional view showing a urinal according to an embodiment of the present invention, and FIG. 2 is a schematic top view of the upper storage chamber of the urinal according to the embodiment of the present invention as viewed from above.

FIG. 1, reference numeral 1 indicates a urinal according to an embodiment of the present invention, in which a plurality of urinals 1 are installed side by side on the front side of a building, for example, a wall surface 2 of a toilet, or are arranged independently. The plumbing fixture drainage pipe 4 extending from the lower part of the urinal 1 on the wall surface 2 side through the wall surface 2 of the building to the back side of the wall surface 2 is slightly inclined downward below the back side of the wall surface 2 on which the urinal 1 is installed. However, it is connected to a drainage horizontal branch pipe 6 for drainage extending laterally. The drainage lateral branch pipe 6 is arranged so as to be inclined from the horizontal direction, and the upstream side of the inclination is referred to as the upstream side, and the downward side of the inclination is referred to as the downstream side. The drainage horizontal branch pipe 6 is connected to a vertical drainage pipe (not shown) on the downstream side. Each urinal 1 puts wash water for washing itself (including a state where only clean water is supplied and / or a state where clean water is drained as wash water mixed with urine) on the back side of the wall surface 2. The water is drained to the drainage lateral branch pipe 6 through the extending instrument drainage pipe 4. The present invention is not limited to the wall drainage urinal, and can be applied to a floor drainage urinal installed on a floor drainage pipe or a drainage lateral branch pipe.

As shown in FIGS. 1 and 2, the urinal 1 includes a urinal body 8 made of pottery and an automatic urinal cleaning unit 10 for cleaning the urinal body 8. The urinal 1 is a wall-mounted urinal mounted along the back wall surface 2, but the urinal 1 may be a floor-standing urinal placed directly on the floor surface. Further, the urinal 1 may be, for example, a water-saving urinal that is washed with a washing water amount of 0.5 L to 2.0 L (preferably 0.8 L to 1.0 L) at the time of washing. Hereinafter, the front side of the urinal 1 will be described as the front side, the back side thereof as the rear side (back side), the left side when viewed from the front of the urinal 1, the left side, and the right side when viewed from the front of the urinal 1 as the right side.

The urinal body 8 of the urinal 1 has a storage chamber 12 for accommodating the automatic urinal cleaning unit 10 at the upper end, a bowl portion 16 forming a bowl surface extending downward from the front surface 14 of the storage chamber 12, and the bowl portion 16. A drainage port 18 formed at the bottom of the bowl portion 16, a trap portion 20 that stores accumulated water W on the downstream side of the drainage port portion 18 to form a sealing water, and a drainage device on the downstream side of the trap portion 20. It is provided with a connection portion 22.
A drainage socket 24 is connected to the drainage device connection portion 22 of the urinal main body 8, a drainage device drainage pipe 4 is connected to the drainage socket 24, and the device drainage pipe 4 extends from the front side to the back side of the wall surface 2. It is connected to the drainage lateral branch pipe 6.

Next, the automatic toilet bowl cleaning unit 10 shown in FIGS. 2 and 3 will be described.
FIG. 3 is a diagram showing a schematic configuration of an automatic toilet bowl cleaning unit for a urinal according to an embodiment of the present invention.
The storage chamber 12 is formed by a lid 23 that is separate from the urinal body 8. Further, the front surface 14 of the storage chamber 12 is formed so as to be inclined toward the rear. The automatic toilet cleaning unit 10 housed in the storage chamber 12 has a water supply pipe 26 for supplying cleaning water from a water supply source such as a water supply, a water stop valve 28 provided in the water supply pipe 26, and a water stop valve 28 on the downstream side. The valve unit 30 provided and a spreader (water supply means) 32 which is a water discharge unit for discharging the washing water supplied from the valve unit 30 to the bowl portion 16 are provided.

The valve unit 30 has a branch portion 34 for branching the water supply pipe 26 into the main water supply flow path 36 and the electrolyzed water flow path 42, a constant flow valve 38 provided in the main water supply flow path 36, and a constant flow valve 38 on the downstream side. The main water supply flow path electromagnetic valve 40 provided to supply and stop the main water supply, the constant flow valve 44 provided in the electrolytic water flow path 42, and the water supply water provided on the downstream side of the constant flow valve 44 and containing the electrolyzed water. It is provided with an electrolyzed water flow path electromagnetic valve 46 for supplying and stopping, a check valve 48 provided on the downstream side of the electrolyzed water flow path electromagnetic valve 46, and an electrolyzed water injection unit 50 for injecting electrolyzed water (sterilized water). There is. Further, the spreader 32 is attached to a human body detection sensor (detection means) 52 that faces the front surface of the bowl portion 16 and detects the presence or absence of a user. Here, the electrolyzed water injection unit 50 has a mechanism capable of generating hypochlorite from chloride ions in the washing water in the electrolyzed tank in the electrolyzed water injection unit 50 to generate electrolyzed water (sterilized water). The generated electrolyzed water (sterilized water) can be injected into the washing water. Electrolyzed water (sterilized water) is water containing a component that produces hypochlorous acid from chloride ions in the washing water, and has a sterilizing and disinfecting effect on urolithiasis, bacteria, etc. and an effect of suppressing growth. ..

The automatic toilet bowl cleaning unit 10 further includes a control unit 54 (control means) capable of controlling the main water supply flow path solenoid valve 40 or the like based on a detection signal from the human body detection sensor 52 and a predetermined control program or the like. There is.
Specifically, the control unit 54 controls the opening and closing of the main water supply flow path solenoid valve 40 based on the detection signal from the human body detection sensor 52, a predetermined control program, and the like, and flushes the washing water from the spreader 32 to the bowl portion 16. It is designed to spit water. The flow rate of the wash water discharged from the spreader 32 is determined by the time when the main water supply flow path solenoid valve 40 is opened.

Next, in the horizontal direction, the upper portion of the bowl portion 16 forms an arc surface having a relatively large radius of curvature, and the lower portion thereof forms an arc surface having a relatively small radius of curvature. The spreader 32 is provided at a height above the center on the left-right center axis of the bowl portion 16.
In the drainage port portion 18, a perforated plate 58 is arranged at the inlet portion 18a on the upstream side. Further, the drainage port 18 is formed with a drainage port 60 constituting the inlet of the trap portion 20 at the outlet portion 18b on the downstream side.

A drainage device connection portion 22 is provided on the downstream side of the trap portion 20, and the drainage socket 24 is connected to the drainage device connection section 22. However, the drainage socket 24 is omitted and the drainage device connection section 22 is omitted. It is also possible to connect the equipment drainage pipe 4 to the device.

Next, the operation (action) according to the embodiment of the present invention will be described with reference to FIGS. 4 to 9.
FIG. 4 is a time chart showing a first example of the urinal cleaning operation according to the embodiment of the present invention, and FIG. 5 is a time chart showing the second example of the urinal cleaning operation according to the embodiment of the present invention. FIG. 6 is a diagram schematically showing how urinals and urinals flow from the urinal body into the urinal drainage pipe and the drainage lateral branch pipe in the main cleaning mode M0 of the urinal according to the embodiment of the present invention. FIG. 8 is a diagram schematically showing how cleaning water flows from the urinal main body into the urinal drainage pipe and the drainage lateral branch pipe in the first cleaning mode M1 of the urinal according to the embodiment of the present invention, and FIG. 8 is a diagram showing the embodiment of the present invention. FIG. 9 (a) is a diagram schematically showing how the urinal flows from the urinal body into the instrument drain pipe and the drain lateral branch pipe in the second cleaning mode M2 of the urinal according to the embodiment, and FIG. 9 (a) is an embodiment of the present invention. 9 (b) is a diagram showing how urine and wash water flow in the drainage lateral branch pipe when the main washing mode M0 is executed in the drainage lateral branch pipe extending to the downstream side of the urinal. It is a figure which shows the state that the washing water mixed with urine and the washing water flow in the drainage lateral branch pipe when the first washing mode M1 is executed in the drainage lateral branch pipe extending to the downstream side of the urinal according to the embodiment. 9 (c) is a diagram showing how the wash water flows in the drainage lateral branch pipe when the second washing mode M2 is executed in the drainage lateral branch pipe extending to the downstream side of the urinal according to the embodiment of the present invention. ..
In FIGS. 4 and 5, the horizontal axis represents time, and the upper part in the vertical axis direction is an OFF state in which the human body detection sensor 52 does not detect the user and an ON state in which the user is detected. In the lower part of the vertical axis direction, the main water supply flow path solenoid valve 40 is closed and the washing water is not discharged from the spreader 32. It shows a change from the ON state in which the valve is opened and the washing water is discharged from the spreader 32.

First, a first example of a urinal cleaning operation according to an embodiment of the present invention will be described.
As shown in FIG. 4, in the standby state (time t0 to t1), when the user normally stands in front of the urinal 1 (time t1), the human body detection sensor 52 detects the presence of the user and detects information. Is sent to the control unit 54, and the control unit 54 recognizes the existence of the user. In the standby state before the user urinates, the washing water mainly exists as the accumulated water W in the trap portion 20.
When the user urinates in the bowl portion 16 of the urinal 1 (time t1 to t2), urine flows into the trap portion 20 from the bottom 16a of the bowl portion 16, and the large amount of the accumulated water W originally present due to the flowing urine. The part is ejected (replaced). Immediately after the urine has flowed into the trap portion 20, the urine itself is in a state of flowing out to the instrument drain pipe 4 and the drain side branch pipe 6 on the downstream side of the trap portion 20. In the trap portion 20, a liquid having a very high urine concentration in which urine and water are mixed exists, or a new pool water W in which urine almost remains as it is exists. A liquid having a very high urine concentration or urine itself, which is a mixture of urine and water existing in the trap portion 20, will be described below as urine U.

When the user finishes urinating in the bowl portion 16 of the urinal 1 and the user who has finished urinating leaves from the front of the urinal 1, the human body detection sensor 52 changes to a state in which the presence of the user is not detected ( Time t2). When the human body detection sensor 52 changes to the non-detection state after the human body detection sensor 52 continues the detection state for a certain period of time or more, the control unit 54 recognizes that the user has left the urinal 1 and the main cleaning mode M0. Is started, and the urinal washing operation is started (time t2).

In the main washing mode M0, the bowl portion 16 that has received the user's urine is washed and the urine in the trap portion 20 is discharged.
Specifically, the control unit 54 sends a control signal to the main water supply flow path solenoid valve 40 to open the main water supply flow path solenoid valve 40, and a previously determined amount of washing water Wf is transferred from the spreader 32 to the bowl portion 16. Let the water spit out. The amount of wash water discharged is set to a substantially constant instantaneous flow rate (for example, 9 L / min) per unit time. The washing water Wf flows down the bowl portion 16 and reaches the drain port portion 18. Since the flowing wash water Wf receives flow path resistance when passing through the trap portion 20, it is in a state of temporarily accumulating near the inlet of the trap portion 20, and the head height of the temporarily accumulated wash water is high. (The height of the head from the normal reservoir surface) exerts pressure on the washing water drained from the trap portion 20 and changes the instantaneous flow rate of the washing water. As shown in FIG. 6, the washing water Wf flows downstream together with the urine U while pushing out the urine U existing in the trap portion 20. The value of the discharge water amount or the discharge instantaneous flow rate at which the wash water Wf and the urine U are discharged downstream from the trap portion 20 is determined from the water amount or the instantaneous flow rate of the wash water Wf discharged from the spreader 32, the head height, and the like. Will be done. For example, the value of the instantaneous discharge flow rate discharged from the trap portion 20 to the downstream side is 7 L / min.

As shown in FIGS. 6 (a) to 6 (d), the wash water Wf and the urine U are drained from the trap portion 20 to the equipment drain pipe 4 via the drain equipment connection portion 22 and the drain socket 24. As shown by the arrow B, the wash water Wf and the urine U flow to the rear of the urinal along the instrument drainage pipe 4 and reach the connection portion 56 with the drainage lateral branch pipe 6.
As shown in FIG. 6A, in the washing water drained from the trap portion 20 to the equipment drain pipe 4 in the main washing mode, the newly flowing washing water Wf mainly causes the urine U in the trap portion 20. It flows like a wash. When this flow reaches the connection portion 56 from the equipment drainage pipe 4, the flow is relatively fast, so that the urine U is a portion of the upstream side F of the drainage lateral branch pipe 6 in the upstream side region 6d and the downstream side E. It is extruded so as to be separated from the portion in the downstream region 6e.
As shown in FIG. 6B, when the subsequent washing water Wf flows in, the urine U is divided into the upstream urine Uf and the downstream urine Ue.
Subsequently, as shown in FIG. 6 (c), when the supply of the wash water Wf is completed (time t3), the wash water Wf flows down to the downstream side together with the urine Ue on the downstream side. At this time, the urine Uf that has flowed back in the direction of the upstream side F is left behind without flowing together with the washing water Wf. As shown in FIG. 6D, after the end of the main washing mode, the urine Uf left behind becomes the urine Uf0 in a state where it adheres to the inner wall in the drainage lateral branch pipe 6 and remains.

Further, during the drainage of the main cleaning mode M0, the amount of the washing water and the instantaneous flow rate of the discharge in the main cleaning mode M0 are set to be almost constant each time. The height of the water surface (water surface) WL0 at the highest height in the drainage lateral branch pipe 6 is made almost constant every time. Therefore, bacteria are likely to grow on the boundary portion 6b where the inner wall surface 6a in the drainage lateral branch pipe 6 and the water surface of the urine U (and / or the washing water Wf) at the height of WL0 are in contact with each other, and the urine stone Adhesion (generation) of 6c is likely to occur.

In the main cleaning mode M0, the control unit 54 opens the main water supply flow path solenoid valve 40 for a predetermined time (between time t2 and t3), and discharges, for example, about 0.8 L of cleaning water Wf from the spreader 32. It has become like. At this time, the amount of washing water discharged downstream from the trap portion 20 in the main washing mode M0 is 0.8 L. After a lapse of a predetermined time, the control unit 54 closes the main water supply flow path solenoid valve 40 and ends the main cleaning mode (time t3).

Next, the control unit 54 starts the first cleaning mode M1 after a predetermined time (between time t3 and t4) of, for example, about 20 seconds has elapsed from the end of the main cleaning mode M0 (time t3).
In the first cleaning mode M1, after the main cleaning mode M0 is executed, the inside of the drainage lateral branch pipe 6 is cleaned to the upstream side from the connection portion 56 to which the instrument drainage pipe 4 is connected.
Specifically, the control unit 54 sends a control signal to the main water supply flow path solenoid valve 40 to open the main water supply flow path solenoid valve 40, and a previously determined amount of washing water Wf is transferred from the spreader 32 to the bowl portion 16. Let the water spit out. Immediately before the start of water discharge in the first cleaning mode M1, the cleaning water Wf mainly supplied in the main cleaning mode M0 exists in the trap portion 20 as the accumulated water W. The urine concentration in the pooled water W in the trap portion 20 is in a state of being considerably lowered as compared with that before the start of the main washing mode M0.

In the first cleaning mode M1, the cleaning water Wf flows down the bowl portion 16 and reaches the drain port portion 18. Since the flowing wash water Wf receives flow path resistance when passing through the trap portion 20, it temporarily accumulates up to the head height H1 in the vicinity of the drain port 60 at the inlet of the trap portion 20. The head height H1 from the normal pool surface of the washed water that has been collected exerts pressure on the washing water that is drained from the trap portion 20. In this way, the head height changes depending on the amount of supplied water and the like even when the instantaneous supply flow rate is almost constant. The wash water Wf flows downstream together with the urine U while pushing out the urine U existing in the trap portion 20. The value of the discharge water amount or the discharge instantaneous flow rate at which the wash water Wf and the urine U are discharged downstream from the trap portion 20 is determined from the water amount or the instantaneous flow rate of the wash water Wf discharged from the spreader 32, the head height, and the like. Will be done.
In the first cleaning mode M1, the head height of the cleaning water near the inlet of the trap unit 20 is H1, and the corresponding instantaneous flow rate of the cleaning water discharged downstream from the trap unit 20 is F1. There is. For example, the value of the instantaneous discharge flow rate F1 discharged from the trap portion 20 to the downstream side is 7 to 8 L / min.

As shown in FIGS. 7A to 7C, the washing water Wf flows from the trap portion 20 to the rear of the urinal along the equipment drainage pipe 4 and with the drainage lateral branch pipe 6 as shown by the arrow B. Reach the connection portion 56.
As shown in FIG. 7A, the cleaning water drained from the trap unit 20 to the instrument drain pipe 4 in the first cleaning mode M1 is mainly the newly flowing cleaning water Wf in the trap unit 20. The washing water Wf supplied in the main washing mode M0 flows so as to be washed away. When the flow of the washing water Wf reaches the connection portion 56 from the equipment drain pipe 4, the flow is relatively fast, so that the washing water Wf is divided into an upstream side F and a downstream side E of the drainage lateral branch pipe 6. Spread like. The portion of the wash water Wf toward the upstream side F flows back so as to cover the upstream side of the urine Uf0 in the attached state (flows back to the upstream side). Therefore, the urine Uf0 in the attached state where the washing water Wf exists on the upstream side F of the connection portion can also be washed.
As shown in FIG. 7B, the highest reaching point T1 reached by the washing water Wf on the upstream side F of the drainage lateral branch pipe 6 in the first washing mode M1 is the urine Uf (or washing) in the main washing mode M0. The water Wf) is located on the upstream side of the highest reaching point T0 reached on the upstream side F of the drainage horizontal branch pipe 6.
When the supply of the washing water Wf is completed (time t5), the washing water Wf flows down to the downstream side together with the urine Uf0. At this time, a part of the urine-mixed water Uf1 out of the washing water Wf and the urine Uf0 that has flowed back in the direction of the upstream side F may be left behind without flowing together with the washing water Wf. Therefore, as shown in FIG. 7 (c), after the end of the first washing mode M1, the relatively low-concentration urine-mixed water Uf1 left behind adheres to the inner wall in the drainage lateral branch pipe 6. It will be in the remaining state.

Further, during the drainage of the first cleaning mode M1, the value of the amount of discharged water discharged downstream from the trap portion 20 in the first cleaning mode M1 or the value of the instantaneous discharge flow rate is downstream from the trap portion 20 in the main cleaning mode M0. It is set so that the value is equal to or greater than the value of the amount of discharged water discharged to the side or the value of the instantaneous discharge flow rate. Therefore, as shown in FIG. 9B, the draft surface (water surface) WL1 at the highest height position in the drainage lateral branch pipe 6 during drainage in the first cleaning mode M1 is drainage during drainage in the main cleaning mode M0. It rises to a position higher than the draft surface (water surface) WL0 at the highest height in the lateral branch pipe 6. Therefore, the portion on the boundary portion 6b where urinary stones 6c are relatively likely to occur in the normal main cleaning mode M0 can be washed with washing water that reaches the draft surface WL1 at the highest height position above the boundary portion 6b. It is possible to suppress the growth of bacteria on the boundary portion 6b and suppress the attachment (development) of the urinary stone 6c. Even if the draft surface WL1 in the first cleaning mode M1 is at the same height as the draft surface WL0 of the boundary portion 6b, the boundary portion 6b can be cleaned with relatively clean cleaning water, so that the boundary portion 6b It is possible to suppress the growth of the above bacteria and suppress the attachment (development) of urinary stone 6c.
Further, in the first washing mode M1, the urine concentration of the washing water Wf and the urine-mixed water Uf1 flowing in the drainage horizontal branch pipe 6 is the urine U flowing in the drainage horizontal branch pipe 6 and the washing water Wf in the main washing mode M0. It is lower than the urine concentration. Therefore, in the first washing mode M1, the boundary portion 6b can be washed with relatively clean washing water.

In the first cleaning mode M1, the control unit 54 opens the main water supply flow path solenoid valve 40 for a predetermined time (between time t4 and t5), and discharges, for example, about 1.0 L of cleaning water Wf from the spreader 32. It is designed to let you. At this time, the amount of washing water discharged downstream from the trap portion 20 in the first washing mode M1 is 1.0 L. After a lapse of a predetermined time, the control unit 54 closes the main water supply flow path solenoid valve 40 and ends the first cleaning mode M1 (time t5).

Next, the control unit 54 starts the second cleaning mode M2 after a predetermined time (between time t5 and t6) of, for example, about 20 seconds has elapsed from the end of the first cleaning mode M1 (time t5) (time t5). Time t6). That is, in the second cleaning mode M2, after the first cleaning mode M1 is executed, the cleaning water obtained by cleaning the upstream region 6d on the upstream side F of the connection portion 56 by the first cleaning mode M1 is generally the connection portion 56. After a predetermined time that is expected to flow down to the downstream side E has elapsed, cleaning of the upstream region 6d on the upstream side of the connection portion 56 is started again.
Specifically, the control unit 54 sends a control signal to the main water supply flow path solenoid valve 40 to open the main water supply flow path solenoid valve 40, and spreads the amount of wash water Wf determined earlier in the second wash mode M2. Water is discharged from 32 to the bowl portion 16. Immediately before the start of water discharge in the second cleaning mode M2, the cleaning water Wf mainly supplied in the first cleaning mode M1 exists in the trap portion 20 as the accumulated water W. The urine concentration in the pooled water W in the trap portion 20 is in a state of being lower than that before the start of the first washing mode M1.

In the second cleaning mode M2, the cleaning water Wf flows down the bowl portion 16 and reaches the drain port portion 18. Since the flowing wash water Wf receives flow path resistance when passing through the trap portion 20, it is in a state of being temporarily accumulated in the vicinity of the drain port 60 at the inlet of the trap portion 20, and the temporarily accumulated cleaning is performed. The head height H2 of the water (the height from the surface of the accumulated water W in the normal state) exerts pressure on the washing water drained from the trap portion 20 and changes the instantaneous flow rate of the washing water. The wash water Wf flows downstream together with the wash water Wf while pushing out the wash water Wf existing in the trap portion 20. The value of the amount of discharged water or the instantaneous flow rate of the washing water Wf discharged downstream from the trap portion 20 is determined from the amount or the instantaneous flow rate of the washing water Wf discharged from the spreader 32, the head height, and the like.
In the second washing mode M2, the head height of the washing water at the bottom of the bowl portion 16 is H2, and the corresponding instantaneous discharge flow rate discharged from the trap portion 20 to the downstream side is F2. For example, the value of the instantaneous discharge flow rate F2 discharged from the trap portion 20 to the downstream side is 7 to 9 L / min.

As shown in FIGS. 8 (a) to 8 (c), the wash water Wf flows from the trap portion 20 to the rear of the urinal along the instrument drain pipe 4 and flows to the rear of the urinal, as shown by the arrow B, and the drain side branch pipe 6 Reach the connection portion 56 with.
As shown in FIG. 8A, the cleaning water drained from the trap unit 20 to the instrument drain pipe 4 in the second cleaning mode M2 is mainly the newly flowing cleaning water Wf in the trap unit 20. The cleaning water Wf supplied in the first cleaning mode M1 is flushed out. When the flow of the washing water Wf reaches the connection portion 56 from the equipment drain pipe 4, the flow is relatively fast, so that the washing water Wf is a portion in the upstream region 6d of the upstream side F of the drainage lateral branch pipe 6. And the portion of the downstream side E in the downstream side region 6e. The portion of the wash water Wf toward the upstream side F is backflowed (backward to the upstream side) so as to cover the upstream side of the urine-mixed water Uf1 in a state where the portion toward the upstream side F is attached. Therefore, the washing water Wf can also wash the attached urine-mixed water Uf1 existing on the upstream side F of the connection portion.
In the second washing mode M2, the highest reaching point T2 reached by the washing water Wf on the upstream side F of the drainage horizontal branch pipe 6 is the highest reaching point T2 in which the washing water Wf reaches the upstream side F of the drainage horizontal branch pipe 6 in the first washing mode M1. It is located upstream of the highest reach point T1 reached in the upstream region 6d.
As shown in FIG. 8B, when the supply of the washing water Wf is completed (time t7), the washing water Wf flows down to the downstream side together with the urine-mixed water Uf1. At this time, the urine-mixed water Uf1 is not left behind in the region F on the upstream side of the connection portion 56, and even if water remains, the concentration of the urine component is considerably reduced by two washings. Since it is considered that the water due to the washed water in the state of being left remains, it is possible to suppress the adhesion of urinary stones into the drainage lateral branch pipe 6.
Therefore, as shown in FIG. 8 (c), after the end of the second washing mode M2, the washing water Wf is drained together with the urine-mixed water Uf1, and the drainage lateral branch pipe 6 suppresses the residual urine. It will be in a clean state.

Further, during the drainage of the second cleaning mode M2, the value of the amount of discharged water discharged downstream from the trap unit 20 in the second cleaning mode M2 or the value of the instantaneous discharge flow rate is from the trap unit 20 in the first cleaning mode M1. It is set so that the value is equal to or greater than the value of the amount of discharged water discharged to the downstream side or the value of the instantaneous discharge flow rate. Therefore, as shown in FIG. 9C, the draft surface WL2 of the water surface (draft surface) in the drainage lateral branch pipe 6 at the time of drainage in the second cleaning mode M2 is the drainage lateral at the time of drainage in the first cleaning mode M1. The water surface (draft surface) in the branch pipe 6 rises to a position higher than the draft surface WL1. Therefore, the portion on the boundary portion 6b where the urinary stone 6c is relatively likely to occur in the normal main cleaning mode M0 can be washed with the washing water reaching the draft surface WL2 at the highest height above the boundary portion 6b. , The growth of bacteria on the boundary portion 6b can be suppressed, and the attachment (development) of the urinary stone 6c can be suppressed. Further, in the second washing mode M2, the urine concentration of the washing water Wf flowing in the drainage horizontal branch pipe 6 is lower than the urine concentration of the urine U and the washing water Wf flowing in the drainage horizontal branch pipe 6 in the main washing mode M0. Further, in the first washing mode M1, the urine concentrations of the urine Uf1 and the washing water Wf flowing in the drainage lateral branch pipe 6 are reduced. Therefore, in the second washing mode M2, the boundary portion 6b can be washed with relatively clean washing water.

In the second cleaning mode M2, the control unit 54 uses the main water supply flow path for a predetermined time (between times t6 and t7) longer than the predetermined time when the main water supply flow path solenoid valve 40 in the first cleaning mode M1 is opened. The solenoid valve 40 is opened so that, for example, about 1.2 L of wash water Wf is discharged from the spreader 32. At this time, the amount of washing water discharged downstream from the trap portion 20 in the second washing mode M2 is 1.2 L. After a lapse of a predetermined time, the control unit 54 closes the main water supply flow path solenoid valve 40 and ends the second cleaning mode M2 (time t7).

The control unit 54 opens, for example, the electrolyzed water flow path electromagnetic valve 46 as necessary after the second cleaning mode M2 is completed, and the electrolyzed water (for example, sterilized water containing hypochlorous acid). The electrolyzed water washing mode D in which the injected washing water is discharged from the spreader 32 to the bowl portion 16 can be executed. By flowing electrolyzed water after the inside of the drainage horizontal branch pipe 6 is washed, the inside of the trap portion 20 and the drainage horizontal branch pipe 6 can be sterilized and disinfected, and the water remaining in the trap portion 20 and the drainage horizontal branch pipe 6 can be sterilized. It is possible to suppress the growth of urinary stones and the like in the water and suppress the adhesion (development) of urinary stones for a long period of time. Further, the timing of injecting the washing water into which the electrolyzed water (for example, sterilized water containing hypochlorous acid) is injected is when the first washing mode M1 is executed, or when the second washing mode M2 is executed, or the first washing mode. It may be at the time of execution of both M1 and the second cleaning mode M2.

After the second cleaning mode M2 is completed, the control unit 54 continues the equipment cleaning standby state until a certain predetermined time elapses, for example, until a predetermined time of about 2 hours elapses. When a certain predetermined time has elapsed, the control unit 54 restarts the first cleaning mode M1. By repeating the first cleaning mode M1 and the second cleaning mode M2 every time a predetermined period elapses from the end of the second cleaning mode M2, urinary stones adhere (generate) in the drainage lateral branch pipe 6. ) Can be suppressed.

Next, the control unit 54 starts the first cleaning mode M1 again as described above (time t8). The cleaning operation in the first cleaning mode M1 is the same as the cleaning operation in the first cleaning mode M1 described above, and thus the description thereof will be omitted.
In the first washing mode M1, the washing water can wash the upstream region 6d and the downstream region 6e in the drainage lateral branch pipe 6, suppresses the growth of bacteria, and adheres (generates) urinary stones 6c. Can be suppressed.
Further, in the first washing mode M1, the washing water can be washed by the draft surface WL1 that reaches the maximum height position of the boundary portion 6b or more in the drainage lateral branch pipe 6, and the growth of bacteria on the boundary portion 6b. Can be suppressed and the adhesion (generation) of urinary stone 6c can be suppressed.

Next, the control unit 54 further starts the second cleaning mode M2 after a predetermined time (between time t9 and t10) of, for example, about 20 seconds has elapsed from the end of the first cleaning mode M1 (time t9). (Time t10). The cleaning operation in the second cleaning mode M2 is the same as the cleaning operation in the second cleaning mode M2 described above, and thus the description thereof will be omitted.
In the second washing mode M2, the washing water can more effectively wash the upstream region 6d and the downstream region 6e in the drainage lateral branch pipe 6, suppress the growth of bacteria, and the urinary stone 6c. Adhesion (generation) can be suppressed.
Further, in the second washing mode M2, the washing water can be washed with the washing water reaching the draft surface WL2 at the highest height position of the boundary portion 6b or more in the drainage lateral branch pipe 6, and can be washed on the boundary portion 6b. It is possible to suppress the growth of bacteria and suppress the attachment (development) of urinary stone 6c.

After that, after the second cleaning mode M2 is completed, the equipment cleaning standby state is continued, and when a certain predetermined time elapses, for example, when a predetermined time of about 2 hours elapses, the control unit 54 again performs the second cleaning mode. One cleaning mode M1 and the second cleaning mode M2 can be controlled to be repeated. In other words, the control unit 54 can control the pair of the first cleaning mode M1 and the second cleaning mode M2 to be repeatedly executed at predetermined time intervals after the end of the main cleaning mode M0.

Subsequently, with reference to FIG. 10, the cleaning operation of the urinal 1 will be described when the users are replaced quickly. FIG. 10 is a time chart showing a third example of the cleaning operation of the urinal according to the embodiment of the present invention.

As shown in FIG. 10, at time t2, the control unit 54 starts the main washing mode M0 when it recognizes that the user has left the urinal 1, and starts the urinal washing operation. Then, originally, the first cleaning mode M1 is started after a predetermined time of about 20 seconds has elapsed after the main cleaning mode M0 ends at time t3, but here, a predetermined time of about 20 seconds from time t3 is started. Recognizing the existence of a new user before the passage of time (time t4).
At this time t4, the control unit 54 cancels the scheduled execution of the first washing mode M1 and the second washing mode M2, and forcibly starts supplying the washing water to the bowl portion 16. Execute M3. This forced start mode M3 is executed from time t4 to time t5.

Further, at time t6, the control unit 54 starts the main washing mode M0 when it recognizes that the user has left the urinal 1, and starts the urinal washing operation. The main cleaning mode M0 is executed from time t6 to time t7, and the first cleaning mode M1 is started after a predetermined time of about 20 seconds has elapsed after the main cleaning mode M0 ends at time t7 (time t8). This first cleaning mode M1 is executed from time t8 to time t9.
Then, originally, the second cleaning mode M2 is started after a predetermined time of about 20 seconds has elapsed after the first cleaning mode M1 ends at time t9, but here, about 20 seconds from the time t9. The existence of a new user is recognized before the predetermined time elapses (time t10).
At this time t10, the control unit 54 cancels the scheduled execution of the second washing mode M2 and executes the forced start mode M3 for forcibly starting the supply of the washing water to the bowl portion 16. This forced start mode M3 is executed from time t10 to time t11.

Next, the action and effect of the urinal 1 according to the above-described embodiment of the present invention will be described.
In the urinal 1 according to the embodiment of the present invention, as shown in FIG. 10, the control unit 54 is a human body from the execution of the main cleaning mode M0 to the execution of the first cleaning mode M1 or the second cleaning mode M2. When the detection sensor 52 detects the approach of the user, the forced start mode for canceling the scheduled execution of the first washing mode and the second washing mode and forcibly starting the supply of the washing water to the bowl portion 16. Has M3. As a result, since the user needs a predetermined preparation time from approaching the urinal to starting urination, the urinal 1 that flows into the instrument water distribution pipe 4 and the drainage lateral branch pipe 6 in the forced start mode M3 The drainage is relatively clean water that contains almost no urine. Therefore, by executing the forced start mode M3, urinary stones are generated in the drainage lateral branch pipe 6 due to the retention event, as compared with the case where the first cleaning mode M1 and the second cleaning mode M2 are performed while the user is urinating. Can be suppressed.

In the above-described embodiment, the forced start mode M3 is executed every time the approach of the user is detected between the execution of the main cleaning mode M0 and the execution of the first cleaning mode M1 or the second cleaning mode M2. However, the present invention is not limited to this, for example, when the number of users using the urinal 1 is counted and the condition for executing the forced start mode M3 in a state where the count exceeds a predetermined number is satisfied. , The forced start mode M3 may be executed.

Further, in the above-described embodiment, the second cleaning mode M2 is executed after a predetermined time of about 20 seconds has elapsed after the execution of the first cleaning mode M1 is completed, but the present invention is not limited to this. It is not necessary to execute the second cleaning mode M2.

Subsequently, the cleaning operation of the urinal according to the modified example of the present invention will be described with reference to FIG. FIG. 11 is a time chart showing an example of a urinal cleaning operation according to a modified example of the present invention.

The urinal 100 according to the modification of the present invention is the same as the urinal 1 according to the embodiment of the present invention described above in that it has the present cleaning mode M0, the first cleaning mode M1, and the second cleaning mode M2. However, it differs in that it has a pre-cleaning mode N0.
As shown in FIG. 11, when the control unit 154 of the urinal 100 recognizes that the user has approached the urinal 100 at time t1, the pre-washing mode N0 that supplies washing water to the bowl portion 116 of the urinal 100 To execute. By executing this pre-washing mode N0, the surface of the bowl portion 116 is wetted by the washing water, so that it is possible to prevent urine from directly adhering to the surface of the bowl portion 116. This pre-cleaning mode N0 is executed from time t1 to time t2.

At time t3, the control unit 154 starts the main washing mode M0 when it recognizes that the user has left the urinal 1, and starts the urinal washing operation. Then, originally, the first cleaning mode M1 is started after a predetermined time of about 20 seconds has elapsed after the main cleaning mode M0 ends at time t4, but here, a predetermined time of about 20 seconds from time t3 is started. The existence of a new user is recognized before the lapse of time (time t5).
At this time t4, the control unit 154 cancels the scheduled execution of the first cleaning mode M1 and the second cleaning mode M2, and executes the pre-cleaning mode N0. This pre-cleaning mode N0 is executed from time t4 to time t5. Regarding the pre-cleaning mode N0 executed here, the supply amount of the washing water supplied to the bowl portion 116 is the normal pre-cleaning mode N0 (for example,). , The amount of the washing water supplied to the bowl portion 116 in the pre-washing mode N0) executed from the time t1 to the time t2 is larger than the supply amount.

Therefore, when the approach of the user is detected between the execution of the main cleaning mode M0 and the execution of the first cleaning mode M1, the scheduled executions of the first cleaning mode M1 and the second cleaning mode M2 are cancelled. By executing the pre-cleaning mode N0 in which the amount of wash water supplied to the bowl portion 116 is larger than in the normal state, the pre-cleaning mode N0 can play a part of the role of the first cleaning mode M1 and is used. Compared with the case where the first washing mode M1 and the second washing mode M2 are performed while the person is urinating, the generation of urinary stones in the drainage lateral branch pipe due to the retention event can be suppressed.

The elements included in each of the above-described embodiments can be combined as long as technically possible, and the combination thereof is also included in the scope of the present invention as long as the features of the present invention are included.

1 Urinal 2 Wall surface 4 Equipment drainage pipe 6 Drainage horizontal branch pipe 6a Inner wall surface 6b Boundary 6c Urinal 6d Upstream area 6e Downstream area 8 Urinal body 10 Automatic toilet cleaning unit 12 Storage room 14 Front 16 Bowl part 16a Bottom 18 Drainage port 18a Inlet part 18b Outlet part 20 Trap part 22 Drainage equipment connection part 23 Lid 24 Drainage socket 26 Water supply pipe 28 Water stop valve 30 Valve unit 32 Spreader 34 Branch part 36 Main water supply flow path 38 Constant flow valve 40 Main water supply Flow path electromagnetic valve 42 Electrolytic water flow path 44 Constant flow valve 46 Electrolytic water flow path Electromagnetic valve 48 Check valve 50 Electrolytic water injection unit 52 Human body detection sensor 54 Control unit 56 Connection part 58 Eye plate 60 Drainage port B Arrow E Downstream side F upstream Side M0 Main cleaning mode M1 First cleaning mode M2 Second cleaning mode M3 Forced start mode N0 Pre-cleaning mode T0 Highest reach point T1 Highest reach point T2 Highest reach point U Urinal W Reservoir Wf Wash water WL0 Water surface WL1 Water surface WL2 Water surface

Claims (4)

A urinal that is installed in the toilet and is connected in the middle of the drainage horizontal branch pipe that extends laterally by the equipment drainage pipe.
A urinal having a bowl portion that receives urine flow, a drainage port opened at the bottom of the bowl portion, and a trap portion that collects urine and washing water flowing from the drainage port and discharges the drainage to the instrument drainage pipe. With the main body
A detection means for detecting the user in front of the urinal body and
A water supply means for supplying wash water to the bowl portion and
A control means for controlling the supply of wash water to the bowl portion is provided.
The control means is
When the detection means detects the user's departure, the main washing mode of washing the bowl portion and discharging the urine in the trap portion is used.
After the main cleaning mode is executed, a first cleaning mode in which a part of the cleaning water cleans the inside of the drainage lateral branch pipe on the upstream side of the connection portion to which the equipment drainage pipe is connected.
Have,
The control means further
When the detection means detects the approach of the user between the execution of the main cleaning mode and the start of the execution of the first cleaning mode, the scheduled execution of the first cleaning mode is canceled and the execution of the first cleaning mode is canceled. A urinal characterized by having a forced start mode for forcibly starting the supply of wash water to the bowl portion. In the control means, after the first cleaning mode is executed, it is assumed that the cleaning water that has washed the upstream side of the connection portion by the first cleaning mode flows down to the downstream side of the connection portion. After a lapse of time, a part of the washing water has a second washing mode for washing the upstream side of the connection portion, the first washing mode is executed, and then the execution of the second washing mode is started. The urinal according to claim 1, wherein when the detection means detects the approach of the user, the scheduled execution of the second cleaning mode is canceled and the forced start mode is executed. The urinal according to claim 1 or 2, wherein the control means executes the forced start mode when the count of the number of users using the urinal exceeds a predetermined number of people. A urinal that is installed in the toilet and is connected in the middle of the drainage horizontal branch pipe that extends laterally by the equipment drainage pipe.
A urinal having a bowl portion that receives urine flow, a drainage port opened at the bottom of the bowl portion, and a trap portion that collects urine and washing water flowing from the drainage port and discharges the drainage to the instrument drainage pipe. With the main body
A detection means for detecting the user in front of the urinal body and
A water supply means for supplying wash water to the bowl portion and
A control means for controlling the supply of wash water to the bowl portion is provided.
The control means is
When the detection means detects the approach of the user, a pre-cleaning mode for supplying cleaning water to the bowl portion and a pre-cleaning mode.
When the detection means detects the user's departure, the main washing mode of washing the bowl portion and discharging the urine in the trap portion is used.
After the main cleaning mode is executed, a first cleaning mode in which a part of the cleaning water cleans the inside of the drainage lateral branch pipe on the upstream side of the connection portion to which the equipment drainage pipe is connected.
The control means further
When the detection means detects the approach of the user between the execution of the main cleaning mode and the start of the execution of the first cleaning mode, the scheduled execution of the first cleaning mode is canceled and the execution of the first cleaning mode is canceled. A urinal characterized by performing the pre-washing mode in which the amount of wash water supplied to the bowl portion is larger than usual.

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